package com.tinshow.config.utils;

//import org.apache.log4j.Logger;

import java.security.MessageDigest;

public class CommonUtils {
	
//	private static final Logger logger = Logger.getLogger(CommonUtils.class);
	
	//十六进制下数字到字符的映射数组   
    private final static String[] hexDigits = {"0", "1", "2", "3", "4",   
        "5", "6", "7", "8", "9", "a", "b", "c", "d", "e", "f"};   
    
    private static final String JIA_MI = "C%B^&MK@lee&Ranci";
      
    public static String generatePassword(String inputString){   
//    	logger.info("##############对密码进行加密处理###############");
        return encodeByMD5(inputString+JIA_MI);   
     }   
       
        
    public static boolean validatePassword(String password, String inputString){   
        if(password.equals(encodeByMD5(inputString+JIA_MI))){   
            return true;   
         } else{   
            return false;   
         }   
     }   
      
    private static String encodeByMD5(String originString){   
        if (originString != null){   
            try{   
                //创建具有指定算法名称的信息摘要   
                 MessageDigest md = MessageDigest.getInstance("MD5");   
                //使用指定的字节数组对摘要进行最后更新，然后完成摘要计算   
                byte[] results = md.digest(originString.getBytes());   
                //将得到的字节数组变成字符串返回   
                 String resultString = byteArrayToHexString(results);   
                return resultString.toUpperCase();   
             } catch(Exception ex){   
                 ex.printStackTrace();   
             }   
         }   
        return null;   
     }   
       
      
    private static String byteArrayToHexString(byte[] b){   
         StringBuffer resultSb = new StringBuffer();   
        for (int i = 0; i < b.length; i++){   
             resultSb.append(byteToHexString(b[i]));   
         }   
        return resultSb.toString();   
     }   
       
      
    private static String byteToHexString(byte b){   
        int n = b;   
        if (n < 0)   
             n = 256 + n;   
        int d1 = n / 16;   
        int d2 = n % 16;   
        return hexDigits[d1] + hexDigits[d2];   
     }   

}
